Example Stokes profiles for AD Leo for the 9th December 2019 observation collected with SPIRou. From the top: Stokes I profile (unpolarised); Stokes V profile (circularly polarised) with a clear Zeeman signature of S/N = 6500, and Null N profile, used for quality check of the Stokes profiles (Donati et al. 1997; Bagnulo et al. 2009). The LSD profiles were obtained using a mask containing 838 lines. In all panels, the units are relative to the unpolarised continuum.